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Jpn. J. Appl. Phys. 50 (2011) 065003 (3 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Synthesis of Cu2ZnSnS4 Nanocrystallines by a Hydrothermal Route

Chunrui Wang, Chen Cheng, Yun Cao, Wei Fang, Lijuan Zhao, and Xiaofeng Xu

Department of Applied Physics and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 Renmin Rd. North, Songjiang District Shanghai 201620, P. R. China

(Received February 5, 2011; accepted March 24, 2011; published online June 20, 2011)

Cu2ZnSnS4 is an ideal candidate absorber material for thin film solar cells with an optimal band-gap for a single junction photovoltaic device of 1.4–1.5 eV, high absorption coefficient (>104 cm-1), and abundant elemental components. In this paper, Cu2ZnSnS4 nanocrystallines have been successfully synthesized by a hydrothermal method using CuCl, ZnCl2, SnCl4·5H2O and (NH2)2CS as reaction reagents for the first time. The as-grown product was characterized by X-ray powder diffraction, transmission electron microscopy, high-resolution transmission electron microscopy and selected-area electron diffraction. The results confirm that the product was polycrystalline Cu2ZnSnS4 nanoparticles with the diameter of 5–7 nm. The effect of the reaction temperature and time on the formation of the Cu2ZnSnS4 nanocrystallines was discussed. The band-gap of Cu2ZnSnS4 nanocrystallines was estimated to be 1.70 eV via ultraviolet–visible (UV–vis) absorption spectrum of Cu2ZnSnS4 nanocrystallines. Raman spectrum of Cu2ZnSnS4 nanocrystallines had about 8 cm-1 red-shift in comparison with that of the responding bulk counterpart.

URL: http://jjap.jsap.jp/link?JJAP/50/065003/
DOI: 10.1143/JJAP.50.065003
PACS: 81.20.Ka, 81.05.Hd, 81.07.Bc, 78.40.Fy


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